Yosemite National Park had a comprehensive survey conducted for one week in July 2009. In it, 1,326 visitor groups were systematically selected from all five park entrance stations. There was a 65% response rate. The entire survey and results can be viewed at Yosemite National Park Visitor Study: Summer 2009 [1.5 MB PDF].

75% of visitors were U.S. residents; and 62% of those were from California.

25% of visitors were international visitors. Of those, 14% were from the United Kingdom, 13% from Germany, and small proportions from 31 other countries.

87% of respondents had visited Yosemite National Park at least once in the past 12 months.

57% of respondents were visiting Yosemite National Park for the first time.

11% of the respondents identified themselves as Hispanic, and 11% as Asian. Of those Asian visitors, the most well-represented races were Chinese (24%) and Japanese (22%).

93% of respondents listed "viewing scenery" as their primary activity.

The average length of stay for overnight visitors in the park was 57 hours (2.4 days) and the average length of stay in the areas was 83 hours (3.5 days).

The median group expenditure in the park and the surrounding 50-mile area was $490.